What is the standard form of y=(x - 8) (x + 10) ?
1 Answer
Jul 23, 2016
Check out the explanation.
Explanation:
I would highly recommend using the FOIL method, a mnemonic device that I was taught in my Algebra class. It's simple and very easy to learn and memorize.
So first, let's start off with the equation:
Using the FOIL method, I will:
- Multiply the
x in the first set of parenthesis by thex in the second set of parenthesis
- Multiply the
x in the first set of parenthesis by the10 in the second set of parenthesis
- Multiply the
-8 in the first set of parenthesis by thex in the second set of parenthesis
- Multiply the
-8 in the first set of parenthesis by the10 in the second set of parenthesis.
Now let's combine them all together into one equation:
And let's simplify that equation by combining like terms (in this case it's the two numbers that share
y=x^2+2x-80
And there's your answer!
Edit: and here's a picture of the FOIL method.
https://en.wikipedia.org